GMC 1976 ZEO 6083 Maintenance Manual page 102

Figure 68-Removing Suction Crossover Cover
19 . Remove suction cross-over cover by prying
with screwdriver between cylinder casting and cover
(figure 68).
20 . Examine internal mechanism for any obvious
damage . If internalmechanism has sustained major
damage, due to loss of refrigerant or oil, it may be
necessary to use the Service internal mechanism As-
sembly rather than replace individual parts.
DISASSEMBLY
Use Parts Tray J-9402 (figure 72) to retain com-
pressor parts during disassembly.
1 . Remove internal mechanism from compressor
Figure 69-Numbering Piston and Cylinder Bores
AIR CONDITIONING SYSTEM 1- 8 5
Figure 70-Separating Cylinder Halves
as described in "Compressor Internal Mechanism"
Removal procedure.
2. Identify by pancil mark, or some other suitable
means, each piston numbering them as 1, 2, and 3
(figure 69) .
Number the piston bores in the front cylinder
half in like manner, so that pistons can be replaced
in their original locations.
3. Separate cylinder halves, using a wood block
and mallet (figure 70). Make certain that discharge
cross-over tube does not contact axial plate when
separating cylinder halves (a new Service discharge
cross over tube will be installed later) .
CAUTION : UNDER NO CIRCUM-
STANCES SHOULD SHAFT BE
STRUCK AT EITHER END in an effort
to separate upper and lower cylinder halves
because the shaft and the axial plate could
be damaged.
4. Carefully remove the rear half of the cylinder
from the pistons and set the front cylinder half, with
the piston, shaft and axial plate is Compressing Fix-
ture J-9397 .
5 . Pull
up
on compressor shaft and remove piston
previously identified as No . 1, with balls and shoe
discs, from axial plate.
1 . Inspect the Teflon piston rings
for nicks, cuts
or metal particles imbedded in exposed ring surface
and replace the piston rings as required if either con
dition exists . See "Teflon Piston Ring" Replacement
procedure.
6. Remove and discard the piston shoe discs.